Public Function New( _
   ByVal executable As String, _
   ByVal ParamArray args() As String _
)

public ProcessRunner( 
   string executable,
   params string[] args
)

string tempfile = Path.GetTempFileName();
try
{
    ProcessRunner runner = new ProcessRunner("cmd.exe", "/C", "ECHO", "Hello", ">{0}");

    runner.StartFormatArgs(tempfile);
    Assert.AreEqual(0, runner.ExitCode);

    string output = File.ReadAllText(tempfile).Trim();
    Assert.AreEqual("Hello", output);

    File.Delete(tempfile);
    Assert.AreEqual(0, runner.RunFormatArgs(tempfile));

    output = File.ReadAllText(tempfile).Trim();
    Assert.AreEqual("Hello", output);
}
finally
{ File.Delete(tempfile); }

Dim tempfile As String = Path.GetTempFileName()
Try
    Dim runner As New ProcessRunner("cmd.exe", "/C", "ECHO", "Hello", ">{0}")

    runner.StartFormatArgs(tempfile)
    Assert.AreEqual(0, runner.ExitCode)

    Dim output As String = File.ReadAllText(tempfile).Trim()
    Assert.AreEqual("Hello", output)

    File.Delete(tempfile)
    Assert.AreEqual(0, runner.RunFormatArgs(tempfile))

    output = File.ReadAllText(tempfile).Trim()
    Assert.AreEqual("Hello", output)
Finally
    File.Delete(tempfile)
End Try